Dc Supply Voltage Check - Nokia RH-37 Series Rf Troubleshooting Instructions

Nokia Customer Care

DC Supply Voltage Check

For a quick check of DC power supplies, refer to the diagram below. The RF power sup-
plies are generated in the UEM and can be measured either in the Small Signal Chamber
or in the Base Band Chamber.
The UEM output voltages can be measured at the respective resistors' / capacitors' pads
marked below in brackets, e.g. < C1234 >.
< C7516 >
< C7510 >
< R7516 >
< C7519 >
< C7517 >
< C7521 >
< C7500 >
< R7511/C7516 >
< R2901/C2901 >
AND
< R2900/C2900 >
Issue 1 07/04
UEM
4.75 V [ 4.6V ... 4.9V ]
VR1
2.78 V [ 2.70V ... 2.86V ]
VR2
2.78 V [ 2.70V ... 2.86V ]
VR3
2.78 V [ 2.70V ... 2.86V ]
VR4
2.78 V [ 2.70V ... 2.86V ]
VR5
2.78 V [ 2.70V ... 2.86V ]
VR6
2.78 V [ 2.70V ... 2.86V ]
VR7
16 mA [max. 20 mA]
1.35 V [ 1.32V ... 1.38V ]
V
refRF01
100 uA
1.35 V [ 1.32V ... 1.38V ]
V
refRF02
100 uA
2.7 V [ 2.95V ... 4.7V ]
VBAT
Nokia Corporation
6(b) - RF Troubleshooting Instructions
charge pump (VCP)
Tx modulator (Vcc_ModOut)
TX buffer & EDGE ALCs (VRF_TX)
VCTCXO (+VCC)
digital interface (VDIG)
Rx Front End (VRF_RX)
Bias & Rx CH filters (VF_RX)
RF controls (VPAB_VLNA)
PLL prescaler (VPRE)
phasing dividers of Rx (VLO)
BB buffer (VDIG)
VCO (VCC_VCO)
bias reference (VB_EXT)
bias reference
Triple band PA
RH-37
(RXIINN, RXQINN)
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